JPH03148531A - Air conditioner - Google Patents

Abstract

PURPOSE:To prevent an uncomfortable feeling caused by a cold air feeling when a heating operation is started by a method wherein when the heating operation is started, hot air is distributed to a communication hole arranged in a double floor and an auxiliary indoor blowing port, a part of the hot air is returned back from a recirculation port to a heat exchanger so as to heat it again. CONSTITUTION:When a heating operation is started, hot air is distributed by a blowing amount distribution means (damper) 32 into an auxiliary blowing port 34 opened into an indoor area and a communication hole 37 at an optional location in a double floor 36. A part of the hot air is returned back from a recirculation port 41 to a heat exchanger 27 and then the air is heat exchanged again. With such an arrangement the hot air is concurrently blown from an upper part and a lower part. As a result, an uncomfortable feeling caused by a cold air feeling when the heating operation is started can be prevented and at the same time the temperature can be approached to a set temperature more rapidly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air conditioner, particularly to the control of the blowing air.

BACKGROUND OF THE INVENTION In recent years, importance has been placed on the comfort of the indoor environment provided by air conditioners.

As a conventional technique, there is an air-conditioning/heating system that utilizes an underfloor space, as disclosed in, for example, Japanese Utility Model Application Publication No. 61-3337.

Hereinafter, a conventional air-conditioning device will be explained with reference to FIGS. 6 to 11.

FIG. 6 shows a cross-sectional side view of a conventional heating and cooling device during heating. In FIG. 6, 1 is a chamber. 2#i floor), 2ad floor slab. 1' is the downstairs room, and 3 is this ceiling board. 4 is a space formed between the floor 2 and the ceiling plate 3. 6 is a heat pump type air conditioner installed near the outer wall of the space 4. 6
is an air supply duct of the heat pump type air conditioner 6. 7 is a damper that switches the air path depending on cooling or heating. 8. This is a heating room formed by the floor slab 2a and the wall plate 11. 8a is a partition wall of the heating chamber 8. 8
b is a vent formed at the end of the partition 1i8a.

Reference numeral 9 denotes an air outlet that blows warm air into the heating chamber 8 during heating. Reference numeral 10 denotes an air outlet that blows cold air into the chamber 1 during cooling. 12 is an air supply port of the heat pump type air conditioner 6. 13 is a communication port that communicates with the heating chamber 8 and the space 4. 14 is a communication port that communicates between the chamber 1 and the heating chamber 8.

The operation of the heating and cooling device configured as described above will be described below.

First, during heating, warm air warmed by the heat pump air conditioner 5 is sent to the air supply duct 8. and,
The damper fan operates as shown in FIG. 11, and hot air is sent to the air outlet 9 and flows into the heating chamber 8. At this time,
The floor slab 2a is heated by the hot air, and the room 1 is heated by natural convection generated by the heat on the floor surface. Then, the warm air inside the heating chamber flows through the vent 8 as indicated by the solid line arrow in FIG.
After passing through b, the air flows out from the communication port 13 into the space 4 as shown in FIG. 7, and is returned to the air supply port 12.

Next, during cooling, by blocking the air outlet 9 with the damper, the air cooled by the heat pump type air conditioner 6 is blown directly into the room 1 through the air outlet 10 as shown in FIG. Cool down.

The cold air that has cooled the chamber 1 passes through the communication port 14.13 and reaches the space 4, as shown in FIG. 10, and then is returned to the air supply port 12.

Problems to be Solved by the Invention However, the above configuration has a problem in that it takes time for the indoor temperature to reach the set temperature at the start of operation because hot air is not blown directly into the room during heating.

In addition, since the room is heated by heating the floor slab with hot air and natural convection generated by the heat on the floor surface, there is a problem that heat loss to the floor is large and heating efficiency is poor.

The present invention solves the above problems, and aims to provide an air conditioner that can quickly bring the indoor temperature to the set temperature f at the start of heating operation and improve heating efficiency.

Means for Solving the Problems In order to achieve this object, the air conditioner of the present invention has an indoor unit with a lower air outlet opening into the lower space of a double floor, and an upper air outlet opening into the room. an air outlet switching means for switching the air outlet according to the heating/cooling operation mode; an auxiliary air outlet opened indoors; an air path connecting the auxiliary air outlet and the lower air outlet; A blowout air volume distribution means for distributing hot air to the lower blowout outlet, a recirculation port communicating the air passage and the upper space of the heat exchanger, and a communication hole communicating with the room at an arbitrary position in the double floor. and.

Effects The present invention has the above-described configuration, and when the heating operation is started, the blowout air volume distribution means distributes hot air to the auxiliary blowout opening opened indoors and the communication holes at arbitrary locations on the double floor, and further By returning a portion of the hot air to the heat exchanger through the recirculation port and exchanging heat again, high-temperature air is blown out from above and below at the same time. This prevents the discomfort caused by the feeling of cold air at the start of heating operation and allows the temperature to quickly approach the set temperature.

When the room temperature reaches the set temperature, the airflow distribution means blows out warm air only from the communication holes at arbitrary locations on the double floor, providing a gentle breeze blowing heating from the floor to keep your head cold and feet warm without the discomfort caused by the wind. Create an ideal thermal environment for the mold.

In addition, during cooling, the air outlet switching means blows cold air upward from the upper air outlet of the indoor unit and sucks it in through the communication hole at any location on the double floor, achieving cold head and foot heat type air conditioning without the discomfort caused by wind. be.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIGS. 1 to 4.

21 is a side wall, 22 is a floor slab, and 23 is a ceiling. 24
is a residential area where humans live! ), ASHRAE.

STANDARD is defined as a space with a height of 1800 cm or less and a distance of 60 cm or more from the side wall (the space surrounded by the two-dot chain line in Fig. 2). 26 is an indoor unit of an air conditioner, which is installed on the floor in one corner of the room. The indoor unit 26
An outer shell 26, a heat exchanger 27, and a blower 100 are arranged. The blower 100 is an air outlet cutting means, and is composed of a fan 28 and a casing 29, which can be rotated in forward and reverse directions. 30 is an upper air outlet provided at the upper part of the indoor unit 26.

31 is a lower air outlet provided at the lower part of the indoor unit 26.

Reference numeral 32 denotes a blowout air volume distribution means], which is a damper that has a fulcrum on the outer shell 26 and can be driven. 33 is a wind path. 3
Reference numeral 4 denotes an auxiliary air outlet, which opens at the top of the indoor unit and is connected to the lower air outlet 31 through the air passage 33. 36 is a double floor. 36 is a lower space of the double floor 35, and the lower air outlet 31 is open therein. 37
is a small-diameter communication hole that communicates with the interior of the room at an arbitrary location on the double floor 36. Reference numeral 38 denotes a temperature sensor 11) for detecting the indoor temperature, which is installed in front of the indoor unit 25. 39 is a heat exchanger upper space formed between the heat exchanger 27 and the upper outlet 30. 40 is the air passage 33
and a partition plate that partitions the heat exchanger upper space 39.

41 is a recirculation port provided in the partition plate 40;
The air passage 33 and the heat exchanger upper space 39 are communicated with each other.

The operation of the air conditioner configured as above will be described below.

First, at the start of the heating operation, the 728 rotates and the air warmed by the heat exchanger 27 flows downward. Then, as shown in FIG. 3, the first damper 32 is driven to distribute warm air to the lower outlet 31 and the air passage 33. A part of the warm air distributed to the air passage 33 is
The heat exchanger is sucked into the heat exchanger upper space 39 through the recirculation port 41 and heat exchanged again. By repeating this process, the heated air is blown out from the lower outlet 31 and the auxiliary outlet 34. The high-temperature air blown from the lower outlet 31 passes through the lower space 36 and is blown out from the communication hole 37 to warm the living area 24 from below. At the same time, the high temperature air blown out from the auxiliary outlet 34 warms the living area 24 from above, bringing it closer to the set temperature quickly. When the temperature detected by the temperature sensor 38 reaches the set temperature, the damper 32 is driven to block the air passage 33, and as shown by the solid line in FIGS. After the warm air is blown out to warm the living area 24, it is sucked in from the upper air outlet aO (also used for air intake during heating).

Incidentally, since the communication hole 37 has a minute diameter, the speed of the warm air blown out from it is as small as 0.1 m/- or less, so that humans do not feel uncomfortable due to the airflow.

Next, during the first cooling operation, the fan 28 is set to rotate in the opposite direction to that during the heating operation, and as shown by the dotted lines in FIGS. 1 and 2, the air flows upward and the heat exchanger 27
After being cooled through the air, it is blown upward from the upper outlet 30. Then, the cold air flowing upward is transferred to the ceiling 2.
3, and from there it spreads downward due to its own weight and descends.

After cooling the living area 24, the communication hole 3
7, passes through the lower space 36 of the double floor 36, and is sucked in from the lower air outlet 31 (also used for suction during cooling).

According to the above embodiment, at the start of heating operation, the damper 3
2 is driven to distribute hot air and blow it out from the communication hole 37 and the auxiliary air outlet 34. At this time, a part of the warm air passing through the air passage 33 is transferred from the recirculation port 41 to the heat exchanger 2.
7 is sucked into the upstream side, and heat is exchanged again, making it even warmer. This allows high-temperature air to be blown from both above and below, preventing discomfort caused by the feeling of cold air.

To quickly bring the temperature of the living area 24 close to a set temperature. When the set temperature is reached, the damper 32 is driven to close the air passage 33, and as shown in FIG.
Since the air is blown out to heat the air at 24, heating efficiency is high and a uniform temperature distribution can be obtained. Furthermore, if the communication hole 37 is provided at a position where people live depending on the indoor layout, it will be possible to prevent excess warm air from blowing out from a place other than the living space, such as outside the living area 24. Provides efficient heating.

In addition, during cooling, the cold air is blown upward from the upper outlet 30, hits the ceiling, and then naturally falls under its own weight, so a very uniform temperature distribution is obtained without any discomfort caused by the wind. High quality air conditioning can be achieved.

In this embodiment, the upper and lower air outlet switching means is adapted to switch between forward and reverse rotation of the fan 1, but the air outlet may be switched by a switching damper or the like.

Further, in this embodiment, the lower air outlet is used as the suction port during cooling and the upper air outlet is used as the suction port during heating, but it goes without saying that a dedicated suction port may be provided separately.

Further, in this embodiment, the lower space is formed by a double floor, but it goes without saying that the same effect can be obtained even if the lower space is provided under the floor.

Effects of the Invention As is clear from the above embodiments, the present invention provides an indoor unit with a built-in blower that blows temperature-conditioned air that has been conditioned by a heat exchanger, and a lower space that opens into the lower space of a double floor. Air outlet, 80 upper air outlets in the room, and these air outlets for heating and
an air outlet switching means that switches according to the cooling operation mode;
an auxiliary outlet opening into the room; an air passage connecting the auxiliary outlet and the lower outlet; an air volume distribution means for distributing hot air between the auxiliary outlet and the lower outlet; By providing a recirculation 9 that communicates with the upper space of the heat exchanger and a communication hole that communicates with the room at an arbitrary position in the double floor, the blowout air volume distribution means can distribute the hot air into two at the start of heating operation. By distributing the hot air to the communication hole installed in the heavy floor and the auxiliary air outlet on the indoor side, and also using a part of the warm air from the recirculation port as a heat exchanger to warm it up again, high-temperature air can be drawn from both above and below at the same time. Blow out. This prevents discomfort caused by the feeling of cold air at the start of heating operation, and allows the living area to quickly reach the set temperature. When the living area reaches the set temperature, the hot air is blown out only from the communication holes provided in the double floor by the blowout air volume distribution means. By constructing these communication holes according to the layout of the room to the extent that humans can live in, excess warm air is not blown out from areas other than the living space, resulting in high heating efficiency and a uniform interior that keeps the head cold and feet warm. It is possible to obtain temperature distribution.

During cooling operation, the air outlet switching means blows cold air toward the ceiling (from the upper air outlet on the indoor side), and the cold air that falls due to the difference in specific gravity is sucked in through the communication holes provided in the double floor, thereby maintaining a uniform indoor temperature. It is possible to obtain a distribution.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a sectional view of a room in which the air conditioner is installed.
Fig. 3 is a sectional view of the main part of the air conditioner when heating operation starts, Fig. 4 is a perspective view of the room in which the air conditioner is installed, and Fig. 5
The figure is a cross-sectional view of a conventional air conditioner during heating;
Figure 1-111 is a plan view, Figure 7 is a sectional view taken along the line T in Figure 6, Figure 8 is a sectional view during conventional cooling, and
-V line plan view, FIG. 10 is a sectional view taken along the line ■--■ in FIG. 9, and FIG. 11 is a partially enlarged sectional view corresponding to FIG. 6. 26...-Indoor unit, 27...-Heat exchanger,
30...Upper outlet, 31...-Lower outlet, 32...Outlet air volume distribution means (damper), 3
3... Air path, 34... Auxiliary air outlet, 3
Low...Double floor, 36...Lower space, 3
7--Communication hole, 39...Heat exchanger upper space, 41--Recirculation port, 100...Blower outlet switching means (blower). Name of agent: Patent attorney Shigetaka Awano Haka 1 person 11
1 Figure 1 , A 1 /-, " /-・\■ Figure 3 Figure 4 Figure 5 Figure 111 , . Figure 6 Figure 7 Figure 8 Figure 8 111f/1 Figure 9 Figure 7 m Figure 11 Ill j sl・

Claims (1)

[Claims] An indoor unit that has a built-in blower that blows temperature-controlled air that has been conditioned by a heat exchanger has a lower outlet that opens into the lower space of the double floor, an upper outlet that opens into the room, and these outlets. An air outlet switching means that switches according to the heating/cooling operation mode, an auxiliary air outlet that opens into the room, an air path that connects the auxiliary air outlet and the lower air outlet, and this air path and the lower air outlet. A blowout air volume distribution means for distributing hot air between the two, a recirculation port that communicates the air passage with the space above the heat exchanger, and a communication hole that communicates with the room at an arbitrary position in the double floor. An air conditioner characterized by: